AD 2004-08-16

final rule
Data completeness: 70%

Airworthiness Directives; NARCO Avionics Inc. AT150 Transponders

AD Number
2004-08-16
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 2002-NE-32-AD
FR Citation
69 FR 22386

Unsafe Condition

Reports indicate that AT150 transponders may not recognize and respond properly to Mode S interrogations from Mode S ground stations and TCAS-II airborne equipment.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Modify the transponder by adding a resistor and transistor to the circuit board.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

Before further flight.

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

NARCO Avionics Inc. AT150 transponders, certain serial numbers as specified in the AD.

AI-generated summary from the source AD text. Verify against the official source before acting.

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

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View Official Source ↗